DE4342003A1 - Arrangement for the feed water feed in a combined cycle power plant - Google Patents

Arrangement for the feed water feed in a combined cycle power plant

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Publication number
DE4342003A1
DE4342003A1 DE4342003A DE4342003A DE4342003A1 DE 4342003 A1 DE4342003 A1 DE 4342003A1 DE 4342003 A DE4342003 A DE 4342003A DE 4342003 A DE4342003 A DE 4342003A DE 4342003 A1 DE4342003 A1 DE 4342003A1
Authority
DE
Germany
Prior art keywords
feed water
pump
pressure
low
pressure system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
DE4342003A
Other languages
German (de)
Inventor
Nabil Dipl Ing Rachid
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ABB Patent GmbH
Original Assignee
ABB Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6504581&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE4342003(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by ABB Patent GmbH filed Critical ABB Patent GmbH
Priority to DE4342003A priority Critical patent/DE4342003A1/en
Priority to AT94119097T priority patent/ATE155549T1/en
Priority to EP94119097A priority patent/EP0657626B1/en
Priority to DE59403388T priority patent/DE59403388D1/en
Priority to JP6305086A priority patent/JPH07217816A/en
Priority to CN94119703A priority patent/CN1106906A/en
Priority to US08/353,123 priority patent/US5519998A/en
Publication of DE4342003A1 publication Critical patent/DE4342003A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
    • F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
    • F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
    • F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
    • F01K23/106—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle with water evaporated or preheated at different pressures in exhaust boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
    • F22D11/00—Feed-water supply not provided for in other main groups
    • F22D11/02—Arrangements of feed-water pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Water Supply & Treatment (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Reciprocating Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Turbines (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention relates to a feedwater supply arrangement in a steam generator, preferably in a waste-heat boiler of a combined cycle power plant having at least one waste-heat boiler which is equipped with a high-pressure system and with a low-pressure system which in each case can be supplied from at least one feedwater vessel (container) (10) and whose feedwater pump lines (trains of pipes) (26 to 31) are respectively designed with three-fold redundancy. Said feedwater pump lines (26 to 31) have pumps (32, 33) with an electric drive motor (35). In each case, one pump (32) for the low-pressure system and one pump (33) for the high-pressure system have a common drive motor (35). <IMAGE>

Description

Die Erfindung betrifft eine Anordnung für die Speisewas­ sereinspeisung in einem Dampferzeuger, vorzugsweise in ei­ nem Abhitzekessel eines Kombikraftwerks mit wenigstens ei­ nem Abhitzekessel, der mit einem Hochdruck-Drucksystem und mit einem Niederdruck-Drucksystem ausgestattet ist, die je­ weils aus wenigstens einem Speisewasserbehälter speisbar sind und deren Speisewasserpumpenstrecke jeweils dreifach redundant ausgeführt sind, welche Speisewasserpumpenstränge Pumpen mit einem elektrischen Antriebsmotor aufweisen.The invention relates to an arrangement for the food sereinspitze in a steam generator, preferably in egg a waste heat boiler of a combined cycle power plant with at least one egg a waste heat boiler with a high pressure pressure system and is equipped with a low pressure printing system, each because it can be fed from at least one feed water tank are and their feed water pump line triple each are redundant, which feed water pump lines Have pumps with an electric drive motor.

Es ist allgemein bekannt, für die Bereitstellung von Dampf als Antriebsmedium für Dampfturbinen Speisewasser in einem Dampferzeuger einzuspeisen, in welchem das Speisewasser verdampft und gegebenenfalls überhitzt wird und anschlie­ ßend der betreffenden Dampfturbine zugeführt wird. Ferner ist bekannt, zur Einspeisung des Speisewassers Pumpen vor­ zusehen, die das Speisewasser aus einem Speisewasserbehäl­ ter oder vergleichbarem Speisewasserreservoirs fördern.It is well known for providing steam as a drive medium for steam turbines feed water in one Steam generator feed, in which the feed water is evaporated and possibly overheated and then is fed to the steam turbine in question. Further is known to pump the feed water before watch the feed water from a feed water tank or similar feed water reservoirs.

Bei einem Kraftwerksblock einer Kombianlage werden im Re­ gelfall wenigstens zwei Abhitzekessel vorgesehen, welche entsprechend der vorbeschriebenen Weise mit Speisewasser versorgt werden. Dabei ist es üblich, die Abhitzekessel als sogenannte Zweidruck-Abhitzekessel auszuführen, d. h. mit auf unterschiedlichem Druckniveau befindlichen Rohrlei­ tungssystemen, welche sich entsprechend im Abhitzekessel bezüglich der darin installierten Verdampfer und Überhitzer fortsetzen.In the case of a power plant block of a combined system, If necessary, at least two waste heat boilers are provided, which according to the manner described above with feed water  be supplied. It is common for the waste heat boiler to be to execute so-called two-pressure waste heat boilers, d. H. With Rohrlei at different pressure levels systems, which are accordingly in the waste heat boiler regarding the evaporators and superheaters installed in it continue.

Die Speisewassereinspeisung bei einem solchen Zweidruck-Ab­ hitzekessel erfolgt wie auch bei anderen Kraftwerksanlagen mit dreifacher Redundanz für jedes Drucksystem, d. h. mit­ tels Einsatz von drei voneinander unabhängigen Pumpen. Da­ bei ist üblicherweise jede Pumpe auf 50% der maximalen För­ derleistung ausgelegt, so daß jeweils ein Pumpenaggregat in Reserve bereitsteht, falls ein anderes Aggregat ausfallen sollte.The feed water in such a two-pressure Ab heat boiler is carried out as with other power plants with triple redundancy for each printing system, d. H. with using three independent pumps. There at usually each pump is at 50% of the maximum pump derleistung designed so that each pump unit in Reserve is available if another unit fails should.

Entsprechend der unterschiedlichen Druckstufen, nämlich Hochdruck mit ca. 120 bar und Niederdruck mit ca. 16 bar, sind als motorische Antriebe für die Hochdruckpumpen soge­ nannte Mittelspannungsmotoren vorgesehen, während die Nie­ derdruckpumpen mit Niederspannungsmotoren angetrieben wer­ den, welche einen vergleichsweise ungünstigeren Wirkungs­ grad als die Mittelspannungsmotoren haben.According to the different pressure levels, namely High pressure with approx. 120 bar and low pressure with approx. 16 bar, are so-called motor drives for the high pressure pumps called medium voltage motors provided while the never derdruckpumpen with low voltage motors those that have a comparatively less favorable effect degrees than the medium voltage motors.

Ausgehend von diesem Stand der Technik ist es Aufgabe der Erfindung, eine einfacher gestaltete Anordnung zu schaffen, bei welcher die verfügbare Antriebsleistung für die Pumpen vorteilhafter ausgenutzt werden kann.Based on this state of the art, it is the task of Invention to provide a simpler arrangement at which the available drive power for the pumps can be used more advantageously.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnen­ den Merkmale des Patentanspruchs 1 gelöst. Danach ist vor­ gesehen, daß jeweils eine Pumpe für das Hochdrucksystem und eine Pumpe für das Niederdrucksystem einen gemeinsamen An­ triebsmotor aufweisen. Mit anderen Worten es wird nur noch die Hälfte der bislang erforderlichen Antriebsmotoren benötigt. Im Hinblick auf die günstigere Leistungsausbeute ist dabei in vorteilhafter Weiterbildung der Erfindung vor­ gesehen, daß die Antriebsmotoren generell als Mittelspan­ nungsmotoren ausgebildet sind, was ohne weiteres und ohne Nachteil auch für die Niederdruckpumpen möglich ist.According to the invention, this object is characterized by the solved the features of claim 1. After that is before seen that one pump each for the high pressure system and a pump for the low pressure system a common type have drive motor. In other words, it will only be half of the drive motors previously required needed. In view of the more favorable power yield is an advantageous development of the invention  seen that the drive motors generally as a medium chip voltage motors are formed, which easily and without Disadvantage is also possible for the low pressure pumps.

Gemäß einer bevorzugten Ausführungsform der Erfindung ist ein einziger Speisewasserbehälter vorgesehen an welchem die Speisewasserpumpenstränge angeordnet sind. Dementsprechend weist jede Speisewasserleitung vorteilhafterweise eine den Speisewasserpumpensträngen vorgeschaltete Regelstation auf, wobei jeweils in Strömungsrichtung nach der Regelstation jede der drei aus Redundanzgründen vorgesehenen Speisewas­ serleitungen in einen Hochdruck-Pumpenstrang und in einen Niederdruck-Pumpenstrang aufgeteilt ist.According to a preferred embodiment of the invention a single feed water tank is provided on which the Feed water pump lines are arranged. Accordingly each feed water line advantageously has one Feedwater pump lines upstream control station, each in the flow direction after the control station each of the three dishes provided for redundancy reasons in a high-pressure pump line and in one Low pressure pump train is divided.

Eine weitere vorteilhafte Ausgestaltung der Erfindung sieht vor, daß jeder Hochdruck-Pumpenstrang an einer Hochdruck- Sammelleitung und jeder Niederdruck-Pumpenstrang an einer Niederdruck-Sammelleitung anschließt, welche jeweils zum Abhitzekessel geführt sind.A further advantageous embodiment of the invention provides that each high-pressure pump line at a high-pressure Manifold and each low pressure pump train in one Low pressure manifold connects, each to Waste heat boilers are guided.

Diese und weitere vorteilhafte Ausgestaltungen der Erfin­ dung sind Gegenstand der Unteransprüche.These and other advantageous refinements of the Erfin are subject of the subclaims.

Anhand eines in der Zeichnung dargestellten Ausführungsbei­ spiels sollen die Erfindung, vorteilhafte Ausgestaltungen, besondere Vorteile der Erfindung näher erläutert und be­ schrieben werden.Based on an exemplary embodiment shown in the drawing the invention, advantageous refinements, special advantages of the invention explained and be be written.

Es zeigt die einzige Figur einen Speisewasserbehälter 10 mit Entgaser 12 und Dampfvorwärmung 14 sowie mit einem Sprühanschluß 16 und einem Sicherheitsventil 18. Der Spei­ sewasserbehälter 10 besitzt drei Speisewassersaugleitungs­ abgänge 20, 22, 24, an welche jeweils eine Filterstation 21, 23, 25 anschließt.The sole figure shows a feed water tank 10 with degasser 12 and steam preheating 14 as well as with a spray connection 16 and a safety valve 18 . The feed water tank 10 has three feed water suction outlets 20 , 22 , 24 , to each of which a filter station 21 , 23 , 25 connects.

In Strömungsrichtung hinter der Filterstation 21, 23, 25 teilt sich die Speisewasserleitung 20, 22, 24 auf in je einen Hochdruck-Pumpenstrang 26, 28, 30 und in einen Nie­ derdruck-Pumpenstrang 27, 29, 31. Jeder der Pumpenstränge 26 bis 31 ist mit einer der Druckstufe angepaßten Pumpe 32, 33 ausgestattet, welche jeweils mit einem Antriebsmotor 35 verbunden und von diesem beaufschlagt.In the flow direction behind the filter station 21 , 23 , 25 , the feed water line 20 , 22 , 24 is divided into a high-pressure pump line 26 , 28 , 30 and a low-pressure pump line 27 , 29 , 31 . Each of the pump lines 26 to 31 is equipped with a pump 32 , 33 adapted to the pressure stage, each of which is connected to a drive motor 35 and acted upon by it.

Druckseitig schließen die jeweiligen Hochdruck- und Nieder­ druck-Pumpenstränge 26 bis 31 an je eine der Druckstufe entsprechende Sammelleitung 36, 37 an, welche zu einem hier nicht näher dargestellten Abhitzekesseln geführt ist. An die druckseitigen Pumpenstränge 26 bis 31 schließen ferner ebenfalls druckstufenbezogen Sammelleitungen 38, 39 an, welche zur Kompensation der Null-Fördermenge dienen.On the pressure side, the respective high-pressure and low-pressure pump lines 26 to 31 each connect to a manifold 36 , 37 corresponding to the pressure stage, which is led to a waste heat boiler, not shown here. Also connected to the pressure-side pump lines 26 to 31 are pressure lines-related manifolds 38 , 39 , which serve to compensate for the zero delivery rate.

Der besondere Vorteil der in der einzigen Figur gezeigten Anordnung besteht darin, daß abgesehen von der Einsparung an Investitionsaufwand bezüglich des geringeren Bedarfs an Antriebsmotoren und der diesbezüglichen elektrischen Ver­ sorgung und Steuerung darüberhinaus auch geringere Be­ triebskosten resultieren aufgrund der Verwendung der vor­ teilhafteren Mittelspannungsmotoren zum Antrieb der Nieder­ druck- wie auch der Hochdruckpumpen.The particular advantage of that shown in the single figure Arrangement is that apart from the saving of investment in terms of lower demand Drive motors and the related electrical Ver supply and control also lower loads drive costs result from the use of the front more partial medium-voltage motors for driving the Nieder pressure as well as high pressure pumps.

Claims (6)

1. Anordnung für die Speisewassereinspeisung in einen Dampferzeuger, vorzugsweise in einen Abhitzekessel eines Kombikraftwerks mit wenigstens einem Abhitzekessel, der mit einem Hochdrucksystem und mit einem Niederdrucksystem aus­ gestattet ist, die jeweils aus wenigstens einem Speisewas­ serbehälter (10) speisbar sind und deren Speisewasserpum­ penstränge (26 bis 31) Pumpen (32, 33) mit einem elektri­ schen Antriebsmotor (35) aufweisen, dadurch gekennzeichnet, daß jeweils eine Pumpe (32) für das Niederdrucksystem und eine Pumpe (33) für das Hochdrucksystem einen gemeinsamen Antriebsmotor (35) aufweisen.1. Arrangement for the feed water feed into a steam generator, preferably into a waste heat boiler of a combined cycle power plant with at least one waste heat boiler, which is equipped with a high pressure system and a low pressure system, each of which can be fed from at least one feed water tank ( 10 ) and whose feed water pump pen strands ( 26 to 31 ) have pumps ( 32 , 33 ) with an electric drive motor ( 35 ), characterized in that in each case one pump ( 32 ) for the low pressure system and one pump ( 33 ) for the high pressure system have a common drive motor ( 35 ). 2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, daß die Antriebsmotoren als Mittelspannungsmotoren ausge­ bildet sind.2. Arrangement according to claim 1, characterized in that the drive motors out as medium voltage motors forms are. 3. Anordnung nach Anspruch 1 oder 2, dadurch gekenn­ zeichnet, daß ein einziger Speisewasserbehälter (10) vorge­ sehen ist, an welchem die Speisewasserleitungen (20, 22, 24) angeschlossen sind.3. Arrangement according to claim 1 or 2, characterized in that a single feed water tank ( 10 ) is easily seen, to which the feed water lines ( 20 , 22 , 24 ) are connected. 4. Anordnung nach einem der vorherigen Ansprüche, da­ durch gekennzeichnet, daß jede Speisewasserleitung (20, 22, 24) eine den Speisewasserpumpensträngen (26 bis 31) vorge­ schaltete Filterstation (21, 23, 25) aufweist.4. Arrangement according to one of the preceding claims, characterized in that each feed water line ( 20 , 22 , 24 ) has the feed water pump lines ( 26 to 31 ) upstream filter station ( 21 , 23 , 25 ). 5. Anordnung nach Anspruch 4, dadurch gekennzeichnet, daß in Strömungsrichtung nach der Filterstation (21, 23, 25) jede der Speisewasserleitungen (20, 22, 24) in einem Niederdruck-Pumpenstrang (26, 28, 30) und in einen Hoch­ druck-Pumpenstrang (27, 29, 31) aufgeteilt ist. 5. Arrangement according to claim 4, characterized in that in the flow direction after the filter station ( 21 , 23 , 25 ) each of the feed water lines ( 20 , 22 , 24 ) in a low-pressure pump train ( 26 , 28 , 30 ) and in a high pressure - Pump line ( 27 , 29 , 31 ) is divided. 6. Anordnung nach einem der vorherigen Ansprüche, da­ durch gekennzeichnet, daß jeder Niederdruck-Pumpenstrang (26, 28, 30) an einer Niederdruck-Sammelleitung (36) und jeder Hochdruck-Pumpenstrang (27, 29, 31) an einer Hoch­ druck-Sammelleitung (37) anschließt, welche jeweils zu we­ nigstens einem Abhitzekessel geführt sind.6. Arrangement according to one of the preceding claims, characterized in that each low-pressure pump line ( 26 , 28 , 30 ) on a low-pressure manifold ( 36 ) and each high-pressure pump line ( 27 , 29 , 31 ) on a high-pressure Collective line ( 37 ) connects, which are each led to at least one waste heat boiler.
DE4342003A 1993-12-09 1993-12-09 Arrangement for the feed water feed in a combined cycle power plant Withdrawn DE4342003A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE4342003A DE4342003A1 (en) 1993-12-09 1993-12-09 Arrangement for the feed water feed in a combined cycle power plant
AT94119097T ATE155549T1 (en) 1993-12-09 1994-12-03 ARRANGEMENT FOR FEEDWATER FEED IN A COMBINED POWER PLANT
EP94119097A EP0657626B1 (en) 1993-12-09 1994-12-03 Feedwater supply arrangement in a combined cycle power plant
DE59403388T DE59403388D1 (en) 1993-12-09 1994-12-03 Arrangement for the feed water feed in a combined cycle power plant
JP6305086A JPH07217816A (en) 1993-12-09 1994-12-08 Array for introducing feed water into combined cycle power plant
CN94119703A CN1106906A (en) 1993-12-09 1994-12-08 Arrangement for introducing the feed water into a combined-cycle power station
US08/353,123 US5519998A (en) 1993-12-09 1994-12-09 Apparatus for introducing feed water into a combined-cycle power station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4342003A DE4342003A1 (en) 1993-12-09 1993-12-09 Arrangement for the feed water feed in a combined cycle power plant

Publications (1)

Publication Number Publication Date
DE4342003A1 true DE4342003A1 (en) 1995-06-14

Family

ID=6504581

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4342003A Withdrawn DE4342003A1 (en) 1993-12-09 1993-12-09 Arrangement for the feed water feed in a combined cycle power plant
DE59403388T Revoked DE59403388D1 (en) 1993-12-09 1994-12-03 Arrangement for the feed water feed in a combined cycle power plant

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE59403388T Revoked DE59403388D1 (en) 1993-12-09 1994-12-03 Arrangement for the feed water feed in a combined cycle power plant

Country Status (6)

Country Link
US (1) US5519998A (en)
EP (1) EP0657626B1 (en)
JP (1) JPH07217816A (en)
CN (1) CN1106906A (en)
AT (1) ATE155549T1 (en)
DE (2) DE4342003A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101839471B (en) * 2010-04-16 2012-10-17 河南蓝马啤酒有限公司 System for recycling cooled hot water in beer production
CN102353037A (en) * 2011-08-30 2012-02-15 上海申能临港燃机发电有限公司 Water supply system of combined cycle generating unit
CN106195998A (en) * 2016-08-31 2016-12-07 无锡华光锅炉股份有限公司 Water-bound in a kind of waste heat boiler high-pressure system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2013976A1 (en) * 1970-03-24 1971-12-23 Kraftwerk Union Ag Emergency water feed system - for nuclear energy steam raising plant esp boiling water reactors
DE2207227A1 (en) * 1971-02-17 1972-08-24 Hitachi Ltd Method and device for restarting a boiler pump feed system
DE2740530A1 (en) * 1977-09-08 1979-03-22 Kraftwerk Union Ag Thermal shock minimising arrangement in steam plant - uses continuous forward or reverse circulating flow through idle line and pump
DE4302486A1 (en) * 1993-01-29 1994-08-04 Abb Patent Gmbh Method and device for operating the water-steam cycle of a thermal power plant

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5399103A (en) * 1977-02-08 1978-08-30 Toshiba Corp Boiler feed water pump controller
JPS60201008A (en) * 1984-03-26 1985-10-11 Hitachi Ltd Method and apparatus for controlling operation of plant
DE59205446D1 (en) * 1991-07-17 1996-04-04 Siemens Ag Process for operating a gas and steam turbine plant and plant for carrying out the process
US5215448A (en) * 1991-12-26 1993-06-01 Ingersoll-Dresser Pump Company Combined boiler feed and condensate pump

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2013976A1 (en) * 1970-03-24 1971-12-23 Kraftwerk Union Ag Emergency water feed system - for nuclear energy steam raising plant esp boiling water reactors
DE2207227A1 (en) * 1971-02-17 1972-08-24 Hitachi Ltd Method and device for restarting a boiler pump feed system
DE2740530A1 (en) * 1977-09-08 1979-03-22 Kraftwerk Union Ag Thermal shock minimising arrangement in steam plant - uses continuous forward or reverse circulating flow through idle line and pump
DE4302486A1 (en) * 1993-01-29 1994-08-04 Abb Patent Gmbh Method and device for operating the water-steam cycle of a thermal power plant

Also Published As

Publication number Publication date
CN1106906A (en) 1995-08-16
JPH07217816A (en) 1995-08-18
EP0657626B1 (en) 1997-07-16
EP0657626A1 (en) 1995-06-14
US5519998A (en) 1996-05-28
DE59403388D1 (en) 1997-08-21
ATE155549T1 (en) 1997-08-15

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